Remove implicit conversions from scoped_refptr to T* in ash

ash/accelerometer/accelerometer_controller.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/accelerometer/accelerometer_controller.h"
 
 #include "ash/accelerometer/accelerometer_observer.h"
 
 namespace ash {
 
 AccelerometerController::AccelerometerController() {
 }
 
 AccelerometerController::~AccelerometerController() {
 }
 
 void AccelerometerController::Initialize(
     scoped_refptr<base::TaskRunner> blocking_task_runner) {
 #if defined(OS_CHROMEOS)
-  reader_.reset(new chromeos::AccelerometerReader(blocking_task_runner, this));
+  reader_.reset(
+      new chromeos::AccelerometerReader(blocking_task_runner.get(), this));
 #endif
 }
 
 void AccelerometerController::AddObserver(AccelerometerObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void AccelerometerController::RemoveObserver(AccelerometerObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 #if defined(OS_CHROMEOS)
 void AccelerometerController::HandleAccelerometerUpdate(
     const ui::AccelerometerUpdate& update) {
   FOR_EACH_OBSERVER(AccelerometerObserver, observers_,
       OnAccelerometerUpdated(update));
 }
 #endif
 
 }  // namespace ash